Saw



Mar. 27, 1923. I 1,449,805.

' c. L. ARNOLD ET AL.`

SAW.

man JAN. 9. 1922.

A TOHIVEYS Patented Mar. 27, 1923.

- SAW. I

Application led. January 9, 1922.

T 0 dl ccfz om t may concer/n Be it known that we, CHARLES L. ARNOLD andCHRLns EDnLnN, citizens of the United States, and residents ofvBardstown, in the county of Nelson and State of Kentucky, have inventedcertain new and useful Improvenients in Saws, of which the following isa specification.

This invention relates to band saws especially adapted for use bybutchers.

An important object of this invention is to provide a band saw havingnovel means whereby the saw may be tensioned as the occasion requiresand whereby the saw may be loosened so that the same may be convenientlydisconnected for cleaning or replacement.

A further object is to pro-vide a butchers saw having novel meanswhereby the several wheels which support the band saw may besimult-aneously operated so that slippage between the saw and theseveral wheels vis reduced to a minimum.

A further object is to provide a saw for use b-y butchers which issimple to operate, durable in use and cheap to manufacture.

Other objects and advantages of the invention will be apparent duringthe course of the following description. Y

In the accompanying drawing, forming a part of this application and inwhich like numerals are employed to designate like parts throughout thesame,

Figure 1 is a vertical sectional view through the improved saw.

Figure 2 is a. plan view of the improved saw, parts being shown insection.

Figure 3 is a detail section through the saw guiding means.

In the drawing wherein for the purpose of illustration is shown apreferred embodiment of the invention the numeral 5 generally designatesa frame which is preferably cast in one piece and which, is provided atits ends with disk-shaped heads 6 and T upon which gear casings 8 and 9are mounted. The gear case 8 is formed integral with the frame while thegear case 9 is mounted for sliding movement on the disk-shaped head 7.As illustrated in Figure 2 the diskshaped head 7 is provided with guideflanges i0 which overhang the laterally projecting arms 11 extended fromthe gear case 9. It will be seen that the laterally projecting arms 11have a sliding connection with the overhanging flanges 10 so that thegear case Serial No. 527,950.

9 may be moved longitudinally on said head. .lhe gear case 9 is providedwith a forwardly extending portion 14 having laterally projecting arms15 overhung by guide -anges 16 extended upwardly from the disk-shapedhead 7. The guide flanges 16 cooperate with the guide fianges 10 inholding the gear case 9 against lateral movement or accidental rotation.

As illustrated in Figure 1 wheels 19 and 2O are arranged beneath theframe 5 and lare secured on the lower end of yshafts 120 by means ofnuts 21, the said nuts 21 being provided with stems threaded into thelower portion of the shafts 120. Also each nut 21 is provided with asocket for the reception of thehub 22 of the adjacent wheel.

The upper end of each shaft 120 is rovided with a beveled gear 24confined within the adjacent gear case and having engagement with apinion 25. The pinions 25 of which there are twoare mounted upon a ishaft 26 composed of a pair of sections, one

of which is provided with a sleeve 28 having a square bore to receivethe squared end 29 of the other section. It is thus seen that the twosections of the shaft 26 are slidably and non-rotatably connected sothat the gear case 9 may be moved with respect to the gear case 8without interfering with the driving connection between the shaft 26Vvided with a plug 41 by means of which the cord may be electricallyconnected to a socket.

Each wheel 19 and 20 is provided with an annular flange 50 about which aband saw 51 is trained. As illustrated in Figure 2, one side of the.frame is open so that the saw may be engaged with the material to be cutwithout interference by the same or the various parts mounted upon theframe. The band saw 51 is passed through a pair of guides 53 carried bythe heads 6 and 7. Pairs of upstanding apertured ears 54 are carried bythe heads 6 and 7 above the depending guides 53 and pivotally supportgrooved guide Wheels 55, the grooves in the groovedWheels receiving theupper edge portion of the band saw, whereby to effectively guide thesaw. It is thus seen that the saw is eiectively guided when engaged Withthe material so that the possibility of the saw breaking is reduced to aminim n.

The saw or band may be tightened from time to time by means of theadjusting screw 160 extended through a tubular guide 161 and having athreaded terminal portion engaged by a thumb nut 162. A coiled spring164 is confined Within the guide 161 and urges the thumb nut 162outwardly so that the gear case 9 and consequently the Wheel :2O isurged to one end of the fra-me so that the band saiv 51 is at all timesmaintained taut. As illustrated in Figure 1 the tubular guide 161 ispreferably formed integral With the head T and when the thumb nut 162 istightened the tension on the gear case 9 and consequently the wheel 2Ois substantially increased. rllhe head is slotted as indicated at 166 toslidably receive the adjacent shaft 120.

ln operation, the operator grips the handles and 61 and places one sideof the band saw over the material to be cut and lowers the frame so thatthe saiv is moved into engagement with the material. The switch 63 atone end of the handle may be conveniently opera-ted for setting themotor in operation and consequently starting the band saw 51. lVhen itis desired to clean the saw, the tension on the band saw may be releasedand the saiv immediately disengaged from the Wheels 19 and 20. The bandsan' may be adjusted as the occasion requires by the simple adjustmentof the thumb nut 16:2.

As illustrated in Figure 1 the heads 6 and 7 are provided with dependinganges 6G which surround the Wheels 19 and 2O and thereby protect thesame from engagement with the material being cut or adjacent articles.

Having thus described our invention what we claim is 1. A butchers sauvcomprising a frame having a pair of spaced disk-shaped heads providedWith depending guard flanges, Wheels arranged beneath said heads andsurrounded by said flanges, shafts connected to said Wheels and havinggears, gear cases receiving said gears, .one of said gear cases beingrigidly connected to one of the heads and the other gear case beingslidably associated With the other head, an extensible shaft havingpinions engaged with said gears, and a motor connected to said lastnamed shaft.

2. A butchers saw comprising a frame having a pair of spaced disk-shapedheads provided with depending guard flanges, wheels arranged beneathsaid heads and surrounded by said flanges, shafts connected to saidWheels and having gears, gear cases receiving said gears, one of saidgear cases being rigidly connected to one of the heads and the othergear case being slidably associated with the other head, an extensibleshaft having pinions engaged With said gears, and a motor connected tosaid last named shaft, a tubular guide mounted on one of said heads, anadjusting screw extended through said tubular guide and havingconnection with said slid-ably supported gear case, and a thumb nuttireaded on said adjusting screw.

A butchers saw comprising a frame having a pair of spaced disk-shapedheads provided with depending guard flanges, Wheels arranged beneathsaid heads and surrounded by said iianges, shafts connected to saidWheels and having gears, gear cases receiving said gears, one of saidgear cases being rigidly connected to one of the heads and the othergear case being slida-bly as sociated with the other head, an extensibleshaft having pinions engaged With said gears, a motor connected to saidlast named shaft, a tubular guide mounted on one of said heads, anadjusting screw extended through said tubular guide and havingconnection with said slidably supported gear case, a thumb nut threadedon said adjusting screw, and a coiled spring confined between one end ofsaid tubular guide and said thumb nut.

A portable san7 comprising a frame having a pair of heads and aconnecting portieri, wheels arranged beneath said heads, shaftsconnected to said wheels and having gears, gear cases mounted on saidheads and housing said gears, one of said cases being slidably mountedon the associated head, an extensible shaft rotatably connected to saidcases and having pinions in mesh with said first named gears, a motormounted on the connecting portion of said frame and having connectionwith said extensible shaft, and means whereby said slidably mountedcasing may be moved l ngitudinally of the frame.

CHARLES LESLIE ARNGLD. CHARLES EDELEN.

